* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.main {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 450px;
  height: 450px;
  border: 3px solid #333;
}
.main .hand-box {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80%;
  border-bottom: 2px solid #333;
}
.main .hand-box div {
  width: 100px;
  height: 100px;
  line-height: 100px;
  text-align: center;
  border: 1px solid #333;
  cursor: pointer;
}
.main .hand-box div:nth-child(2) {
  margin: 0 15px;
}
.main .play-box {
  height: 20%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.play-box .player,
.play-box .aI {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100px;
  height: 100%;
}
.play-box .player {
  border-right: 2px solid #333;
}
.play-box .aI {
  border-left: 2px solid #333;
}
